JP2017179832A - Water storage tank and water closet with the water storage tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water storage tank capable of suppressing steam produced in a tank body from moving from an intake port to an upstream side of an introduction part.SOLUTION: A water storage tank comprises a tank body for reserving water inside and an introduction part for taking air into the tank body. The introduction part has: a communication flow passage for linking the inside of the tank body to the outside; a suction port part provided at an upstream end part of the communication flow passage to form a suction port; a throttle part which projects from an inner wall of the communication flow passage to the inside to reduce the area of a cross section orthogonal to a flow direction of the communication flow passage; and a check valve provided between the suction port part and the throttle part to suppress water in the tank body from flowing out from the suction port. The check valve has a check valve body covering a throttle opening formed by the throttle part, and a valve body provided to the check valve body and abutting on a valve seat surrounding the suction part to maintain watertightness with the valve seat.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a water storage tank that stores water, and a flush toilet equipped with the water storage tank.

  Conventionally, it has a bowl portion in which a rim spout and a jet spout are formed, and a water storage tank for storing water. The rim spout is directly supplied with wash water from the water supply, and the jet spout has a water storage tank. There is known a flush toilet that pressurizes and supplies wash water stored in (see, for example, Patent Document 1). The water storage tanks of these flush toilets are provided with an air inlet for replacing air so as to suppress the increase and decrease of the internal pressure.

JP 2013-227852 A

In the conventional water storage tank described above, for example, when the temperature of the water stored in the water storage tank exceeds the temperature around the water storage tank, the steam is discharged from the inside of the water storage tank to the outside through the intake port. Condensation occurs around the water storage tank due to the steam discharged to the outside of the water storage tank, and there is a concern that it may cause a failure when electrical components are present. In order to solve this concern, it is conceivable to provide a mechanism for returning condensed water by steam to the inside of the water storage tank.
As a mechanism for returning the condensed water due to steam to the inside of the storage tank, for example, a cover is provided above the intake port, and the condensed water can be flowed from the intake port to the inside of the storage tank. There is concern about the increase.

  The present invention has been made to solve the above-described problem, and provides a water storage tank capable of suppressing the steam generated inside the tank body from flowing from the intake port to the upstream side of the introduction portion. The purpose is to do.

  The present invention provides a water storage tank comprising a tank body for storing water therein, and an introduction part for sucking air into the tank body, wherein the introduction part communicates the inside and the outside of the tank body. A communication channel, an intake port portion that is provided at an upstream end of the communication channel and forms an intake port, and a cross section that protrudes inward from the inner wall of the communication channel and is orthogonal to the flow direction of the communication channel. A throttle portion that narrows the cross-sectional area; and a check valve that is provided between the intake port portion and the throttle portion and prevents water inside the tank body from flowing out of the intake port to the outside. The check valve has a check valve main body that covers a throttle opening formed by the throttle portion, and a valve seat that is provided in the check valve main body and surrounds the intake port to thereby contact the valve seat. A water storage tank having a valve body capable of maintaining water tightness therebetween.

  In the present invention configured as described above, since the check valve body covers the throttle opening, it is possible to suppress the vapor generated in the tank body from flowing from the intake port to the upstream side of the introduction portion.

  In the present invention, further, the valve seat is a protruding ridge protruding toward the throttle portion, and the check valve main body has an outer peripheral edge of the check valve main body that is larger than an outer peripheral edge of the convex ridge. It is good also as a structure formed large.

  In this invention comprised in this way, it can suppress more reliably that the vapor | steam produced inside the tank main body goes to the upstream of an introducing | transducing part from an inlet port.

  In the present invention, further, the valve seat is a protruding ridge protruding toward the throttle portion, and the intake port portion is inclined to extend outward from a base end of the valve seat and away from the throttle portion. It is good also as a structure with a surface.

  In this invention comprised in this way, it can suppress more reliably that the vapor | steam produced inside the tank main body goes to the upstream of an introducing | transducing part from an inlet port.

  The present invention is also a flush toilet comprising the water storage tank.

  In the present invention configured as above, a flush toilet provided with a water storage tank capable of suppressing the steam generated inside the tank body from flowing from the intake port to the upstream side of the introduction portion is provided. be able to.

  According to the water storage tank of the present invention, it is possible to suppress the steam generated inside the tank body from going from the intake port to the upstream side of the introduction portion.

The block diagram which shows the flush toilet concerning one Embodiment of this invention. The top view which shows the valve unit of the flush toilet which concerns on one Embodiment of this invention. III-III sectional drawing of FIG. IV-IV sectional drawing of FIG.

Hereinafter, a flush toilet according to an embodiment of the present invention will be described with reference to the drawings.
First, the structure of a flush toilet according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing a flush toilet according to an embodiment of the present invention.

  As shown in FIG. 1, a flush toilet 100 according to an embodiment of the present invention is disposed on a toilet body 200 placed on a floor surface (not shown) of a toilet room, and behind the toilet body 200. Functional unit 300.

  The toilet body 200 includes a bowl portion 210 that receives filth and a drain trap pipe 220 that extends rearward from the bottom of the bowl portion 210. A rim water discharge port 212 for performing rim water discharge and a jet water discharge port 214 for performing jet water discharge are formed in the bowl portion 210. The rim water discharge port 212 is formed at the upper left rear of the bowl part 210 and discharges cleaning water along the upper edge of the bowl part 210. The jet spout 214 is formed at the bottom of the bowl portion 210 and discharges cleaning water toward the drain trap conduit 220. The drain trap pipe 220 forms sealed water and communicates with a sewage pipe (not shown) of the building frame via a drain socket (not shown).

  The function unit 300 includes a valve unit 600 that is controlled by a control unit (not shown) to perform rim water discharge and jet water discharge, a water storage tank 800 that is provided downstream of the valve unit 600 and stores cleaning water, A pressurizing pump 900 that is provided downstream of the water storage tank 800 and pressurizes the cleaning water is provided.

  A water supply path 320 that supplies cleaning water from a water supply source (not shown) is connected to the upstream side of the valve unit 600. On the downstream side of the valve unit 600, a rim-side water supply channel 340 for supplying cleaning water to the rim water spouting port 212 and a tank-side water supply channel 360 for supplying cleaning water to the water storage tank 800 are connected. .

The valve unit 600 includes a constant flow valve 620, a diaphragm type main valve 640 provided downstream of the constant flow valve 620, a water supply path switching valve 660 provided downstream of the main valve 640, and the water supply path switching valve. 660 and a vacuum breaker 680 provided downstream.
The constant flow valve 620 flows into the constant flow valve 620 from the water supply channel 320 and keeps the flow rate of the washing water flowing downstream. The main valve 640 switches between water discharge and water stop at the rim water discharge port 212 and the jet water discharge port 214 by opening and closing. The water supply path switching valve 660 supplies cleaning water toward the rim side water supply path 340 or the tank side water supply path 360. Further, the water supply channel switching valve 660 can supply cleaning water to the rim side water supply channel 340 and the tank side water supply channel 360 at the same timing, and is supplied to the rim side water supply channel 340 and the tank side water supply channel 360. The ratio of the amount of water can be changed arbitrarily. The vacuum breaker 680 suppresses the backflow of the washing water to the upstream side, and is connected to the water storage tank 800 by a drainage channel 390.

  The water storage tank 800 includes a tank main body 820 for storing water, a water supply side check valve 840 provided in the tank main body 820 to which the tank side water supply path 360 is connected, and a VB side check valve 860 to which the drainage path 390 is connected. And have.

A pump-side water supply path 370 is connected to the lower part of the tank body 820, and a pressure pump 900 is connected to the downstream end of the pump-side water supply path 370. Further, the pressurizing pump 900 and the jet water outlet 214 are connected by a jet-side water supply path 380 so that the pressurizing pump 900 pressurizes the cleaning water stored in the tank body 820 and supplies it to the jet water outlet 214. It has become.
In addition, an upper end float switch (not shown) and a lower end float switch (not shown) are disposed inside the tank body 820 so that the water level in the tank body 820 can be detected. The upper end float switch is turned on when the water level in the tank body 820 reaches a predetermined water storage level, and the control unit detects this and closes the main valve 640. On the other hand, the lower end float switch is turned on when the water level in the tank body 820 drops to a predetermined water level, and the control unit detects this and stops the pressurizing pump 900.

  The water supply side check valve 840 suppresses the back flow from the tank body 820 to the tank side water supply channel 360. The VB side check valve 860 suppresses the backflow from the tank body 820 to the drainage channel 390.

Next, with reference to FIG.2 and FIG.3, the vacuum breaker of the flush toilet which concerns on one Embodiment of this invention is demonstrated.
FIG. 2 is a top view showing a valve unit of a flush toilet according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view taken along the line III-III in FIG.

The vacuum breaker 680 is provided downstream of the water supply path switching valve 660 and communicates with the rim side water supply path 340 and a rim side valve body (not shown) that opens and closes the rim side water intake. A rim-side water flow path (not shown) through which wash water that has passed through the rim-side valve body flows, and a rim-side water outlet 684a through which the wash water that has passed through the rim-side water flow path flows out to the rim-side water supply path 340. And have. Furthermore, as shown in FIG. 2, a cylindrical rim-side air inlet 685a is formed above the rim-side valve element.
Similarly, the vacuum breaker 680 is provided downstream of the water supply path switching valve 660 and connects to a tank-side water inlet (not shown) leading to the tank-side water supply path 360, and a tank-side valve body (not shown) that opens and closes the tank-side water inlet. Not shown), a tank-side water flow path (not shown) through which wash water that has passed through the tank-side valve body 682b flows, and a tank side that causes the wash water that has passed through the tank-side water flow path to flow out to the tank-side water supply path And a water outlet 684b. Furthermore, as shown in FIG. 2, a cylindrical tank side air inlet 685b is formed above the tank side valve body.
Further, a water receiving portion 686 is formed around the rim side air introduction port 685a and the tank side air introduction port 685b so as to surround the rim side air introduction port 685a and the tank side air introduction port 685b.

The rim-side valve body is seated on the seat surface formed at the rim-side water inlet by its own weight when not passing water, and closes the rim-side water inlet. At this time, the rim-side water flow path and the rim-side atmosphere introduction port 685a are in communication. Further, when water flows, the rim side valve element is pushed upward by the flow of the flowing wash water, and is seated on the seat surface formed at the lower end of the rim side atmosphere introduction port 685a to introduce the rim side atmosphere. The mouth 685a is closed. At this time, the rim side water inlet and the rim side water outlet 684a communicate with each other.
Similarly, the tank-side valve body is seated on the seat surface formed at the tank-side water inlet by its own weight when not passing water, and closes the tank-side water inlet. At this time, the tank-side water flow path and the tank-side air introduction port 685b are in communication. In addition, when water flows, the tank-side valve element is pushed upward by the flowing water of the wash water, and is seated on the seat surface formed at the lower end of the tank-side atmosphere introduction port 685b to introduce the tank-side atmosphere. The mouth 685b is closed. At this time, the tank side water inlet and the tank side water outlet 684b communicate with each other.

As shown in FIGS. 2 and 3, the water receiving portion 686 is formed so as to surround the outlet portions of the rim-side atmosphere introduction port 685a and the tank-side atmosphere introduction port 685b, and has a box shape with the upper surface opened. It is. The water receiving portion 686 is used when the rim side valve body or the tank side valve body closes the rim side air introduction port 685a and the tank side air introduction port 685b, etc. The washing water overflowing from 685b is received.
Further, a drain port 686 a is opened on the bottom surface of the water receiving portion 686, and the drain port 686 a and the water storage tank 800 are connected by a drain channel 390. As a result, the wash water overflowing from the rim-side air introduction port 685a and the tank-side air introduction port 685b enters the water receiving portion 686 and is drained from the drain port 686a through the drain channel 390 to the water storage tank 800. Further, the facing surface of the water receiving portion 686 is inclined stepwise toward the drain port 686a.

Next, a check valve for a water storage tank of a flush toilet according to an embodiment of the present invention will be described with reference to FIGS. 3 and 4.
4 is a cross-sectional view taken along the line IV-IV in FIG.
As shown in FIG. 3, the tank main body 820 includes an introduction portion 850 that sucks air into the tank main body 820.

The introduction portion 850 includes a communication channel 852 that communicates the inside and the outside of the tank main body 820, an inlet port 854 provided at an upstream end of the communication channel 852, and an inner wall of the communication channel 852 from the inside to the inside. And a throttle portion 856 that narrows the cross-sectional area of the cross section perpendicular to the flow direction (vertical direction in FIG. 3) of the communication flow path 852. Further, a VB-side check valve 860 is provided between the intake port portion 854 and the throttle portion 856.
The intake port portion 854 forms an intake port 854 a and communicates with the drainage channel 390, thereby sucking air from the drainage port 686 a of the water receiving unit 686 to the tank body 820 through the drainage channel 390. In addition, a protruding strip 854b that protrudes toward the throttle portion 856 is formed so as to surround the air inlet 854a, and outward from the base end (upper end in FIG. 3) of the protruding strip 854b and away from the throttle portion 856. An extending inclined surface 854c is formed.
The throttle portion 856 protrudes inward from the inner wall of the communication channel 852 to form a throttle opening 856 a having a horizontal cross section in the communication channel 852.

As shown in FIGS. 3 and 4, the VB-side check valve 860 has a check valve main body 862 that covers the throttle opening 856a from above, and a convex valve portion 854b that is provided on the check valve main body 862 so as to protrude. And a valve body 864 capable of maintaining watertightness with the strip portion 854b. That is, the ridge portion 854 b functions as a valve seat that can come into contact with the valve body 864.
The check valve body 862 is formed in a cylindrical shape having a circular cross section with the lower part opened and the upper part closed, and is slidably provided between the intake port part 854 and the throttle part 856. Further, the outer peripheral edge of the check valve main body 862 is formed larger than the outer peripheral edge of the ridge portion 854b.
With such a configuration, in the normal state, the check valve main body 862 is placed on the throttle portion 856 with the throttle opening 856a covered from above. On the other hand, when water is about to flow backward from the tank body 820 to the drainage channel 390 via the communication channel 852, the VB-side check valve 860 is pushed upward by the water flow of the flowing water, so The valve body 864 is seated on the portion 854b to maintain watertightness with the protruding portion 854b, and closes the intake port 854a.

  According to the water storage tank 800 of the flush toilet 100 according to the embodiment of the present invention described above, since the check valve body 862 covers the throttle opening 856a, the steam generated in the tank body 820 passes through the throttle opening 856a. After that, it reaches the inner wall of the check valve main body 862, becomes condensed water in the check valve main body 862, and flows into the tank main body 820. Therefore, since it is possible to suppress the steam from going to the upstream side from the intake port 854a, it is possible to prevent the control unit and the like from getting wet with condensed water and failing. In addition, it is not necessary to provide a lid or the like for returning the dew condensation water due to the steam into the tank main body 820 at the upper part of the water receiving portion 686, and it is possible to suppress the functional portion 300 from becoming large. Therefore, it is possible to suppress the increase in cost and the degree of freedom in layout of the functional unit 300 due to the increase in size.

  Furthermore, according to the water storage tank 800 of the flush toilet 100 according to the embodiment of the present invention described above, the check valve main body 862 is formed such that the outer peripheral edge of the check valve main body 862 is larger than the outer peripheral edge of the protruding portion 854b. Has been. Therefore, it is possible to more reliably suppress the steam generated inside the tank main body 820 from going to the upstream side from the intake port 854a.

  Further, according to the water storage tank 800 of the flush toilet 100 according to the above-described embodiment of the present invention, the intake port portion 854 is an inclined surface that extends outward from the proximal end of the protruding portion 854b and away from the throttle portion 856. 854c. Therefore, the steam generated in the tank body 820 can be returned to the tank body 820 side by the inclined surface 854c, and the steam generated in the tank body 820 is more reliably directed upstream from the intake port 854a. This can be suppressed.

  The present invention is not limited to the above-described embodiment. For example, the water storage tank of the present invention can be applied to other than flush toilets. Further, the check valve main body only needs to cover the throttle opening, and may be formed in a cylindrical shape having a rectangular horizontal section in which the lower part is opened and the upper part is closed. Furthermore, in the present embodiment, the inner top surface of the check valve main body 862 is formed flat, but, for example, the inner top surface may protrude upward. According to such a form, it becomes easier to return the condensed water into the tank body. Further, the shape of the aperture opening is not limited to the circular shape in the horizontal section, and may be a square in the horizontal section, for example. Further, another VB-side check valve 860 may be provided upstream of the throttle portion 856. According to such a form, it becomes easier to return the dew condensation water into the tank body more reliably.

DESCRIPTION OF SYMBOLS 100 ... Flush toilet 200 ... Toilet body 210 ... Bowl part 212 ... Rim water outlet 214 ... Jet water outlet 220 ... Drain trap pipe 300 ... Functional part 320 ... Water supply path 340 ... Rim side water supply path 360 ... Tank side water supply path 370 ... pump side water supply path 380 ... jet side water supply path 390 ... drainage path 600 ... valve unit 620 ... constant flow valve 640 ... main valve 660 ... water supply path switching valve 680 ... vacuum breaker 684a ... rim side water outlet 684b ... tank side water outlet 685a: Rim-side air introduction port 685b ... Tank-side air introduction port 686 ... Water receiving portion 686a ... Drainage port 800 ... Water storage tank 820 ... Tank body 840 ... Water supply side check valve 850 ... Introduction portion 852 ... Communication channel 854 ... Intake air Mouth part 854a ... Inlet 854b ... Projection (valve seat)
854c ... inclined surface 856 ... throttle part 856a ... throttle opening 860 ... VB side check valve 862 ... check valve body 864 ... valve body 900 ... pressurizing pump

Claims (4)

In a water storage tank comprising a tank body for storing water therein, and an introduction part for sucking air into the tank body,
The introduction portion includes a communication channel that communicates the inside and the outside of the tank body, an intake port that is provided at an upstream end of the communication channel and forms an intake port, and an inner wall from the inner wall of the communication channel. And a throttle part that narrows the cross-sectional area of the cross section perpendicular to the flow direction of the communication flow path, and the water inside the tank main body is provided between the suction part and the throttle part. A check valve that suppresses outflow to the outside,
The check valve is disposed between the check valve main body that covers a throttle opening formed by the throttle portion and a valve seat that is provided in the check valve main body and surrounds the intake port. A water storage tank having a valve body capable of maintaining watertightness. The valve seat is a ridge protruding toward the throttle portion,
2. The water storage tank according to claim 1, wherein the check valve body is formed such that an outer peripheral edge of the check valve main body is larger than an outer peripheral edge of the ridge portion. The valve seat is a ridge protruding toward the throttle portion,
3. The water storage tank according to claim 1, wherein the intake port portion has an inclined surface that extends outward from a base end of the valve seat and extends away from the throttle portion.   A flush toilet provided with the water storage tank according to any one of claims 1 to 3.

Images